Yes.

Sun Tzu 孫子 The Art of Warfare "Keep your friends close and your enemies closer" Although this is attributed to various historical figures I am inclined think that it orginated with Sun Tzu. In a nutshell his philosophy is: "Avoid a war if at all possible, if not, bring it to a speedy conclusion with minimum loss of life, damage to land and property."

The whole point of keeping your enemies closer than your friends is simply to learn their strengths and weakness.

Almost everyone, if not everyone. Until humans stop acting like animals, they always will be.

Successful? No. Not really. The wheels fell off it, in very short order. Thankfully, the mutual friend fell out with her too, not long afterwards. The only reason I entertained her in the first place was because she and the mutual friend were joined at the hip, and I didn't want to lose the mutual friend.

I am nice to my ex so I can see my kids anytime I want. I don't hate her and have accepted she is who she is. However, I don't like her and I don't trust her. I don't know if that counts as a frenemy. It does make me a little two faced, which goes against my core principlas. But doing what is best for my kids and seeing them when I want is a higher priority.

All the time

Yes lots of people who called me friend turned out to to be

Yes lots of people who called me friend turned out to to be

I think it works out of necessity in certain situations such as in politics, war, business, so then in socially necessary situations where a collation is more important than enmity. Perhaps some are able to carry this idea into their personal lives, I don't think I can.

Yes many over the years. Some have turned out to be good friends with exceptions I suppose. I knew I could call them and they would come to a knife fight but bitch behind my back come first light. With that I was satisfied to call them friend.

I had one in junior high in Enid. this girl named stacy was my bitter enemy drawing my ire all the time on the bus and at school. then one day she gave me a card and tried to kiss me! I had all the emotional maturity of an infant so I screwedd that good deal all up. She was a stunning beauty too.

Oh, yes. In my profession, I fougt many battles against her, vigorously. When her control freak tendencies got her in trouble in her job, I was conciliatory. Some time later she showed an interest in dating. I did not repond, as I was already married to a mean-spirited control freak and did not want more of the same.

I have a famenemy Both of my half sisters are so jealous of me they both have taken the high road to taking care of their kids. The third from the youngest is very promiscuous with a different guy almost every week drunk or high on cannabis, I can't remember the last time I had seen her sober. She abandoned 2 of her kids to pursue a brief homosexual encounter. She left her oldest son for my mom to raise. This one did ever thing her infantile brain could come up with to try and get control of my kids. My other sister is a heroin addict and is just ignorant of how to be a human being, she has been in and out of jail. I lost count of how many times. They both are self-destructive and because of the last thing they attempted to do to me, I will never speak to either one of them again.

Yes, but unfortunately they didn't start out that way.

I really don't have the time or patience to allow people like that to remain in my life.
As soon as I identify one, they're gone.
I'm a pretty nice person, but there are some things I have no tolerance for.
Crappy people is one of them.